Diamond or similar article



FIG. 1 is a top plan view of a diamond or similar article showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view shown rotated 221/2 degrees from the view shown in FIG. 1; and,

FIG. 4 is a botton plan view thereof. 

The ornamental design for a diamond or similar article, as shown and described. 